LION SD-400 - Performing Calibration Checks

lion alcolmeter
®
SD-400 User Handbook [v7]
Example
A 0.35mg/l AlcoCal
®
is to be used where the atmospheric pressure
is only 950mB. Standard atmospheric pressure at sea-level is
1,013mB, so the BrAC value of the standard now becomes:
950 x 0.35
= 0.32mg/l BrAC (rounded down)
1,013
But If the atmospheric pressure was higher than standard, say
1050mB, then the value of the same AlcoCal
®
would be:
1,050 x 0.35
= 0.36mg/l BrAC (rounded down)
1,013
AlcoCal
®
Standards and Atmospheric Temperature Effects
Large ambient temperature changes will also modify the alcohol
level in the vapour leaving an AlcoCal
®
standard. They should
therefore be kept away from excess heat and cold, and if they are
exposed to such conditions, temperatures, should be allowed to
recover. Ideally, an AlcoCal
®
standard should not be used if it is
outside the temperature range 15 – 30°C.
9C. Calibration CHECKING
This procedure must be carried out when both the AlcoCal
®
and the
SD-400 are at room temperature in the range 15 – 30°C:
1. Prepare the AlcoCal
®
Standard
Note the value of the AlcoCal
®
to be used (making
allowance for atmospheric pressure and units of
25